The U.S. and other countries at the United Nations Wednesday blocked Russia’s bid to blacklist two rebel groups in Syria saying it would undermine the war-torn country’s halt in fighting.

Reuters reported that Britain, the U.S., France and Ukraine blocked the bid to blacklist Jaish al-Islam and Ahrar al-Sham. Moscow claimed the groups should have been excluded because of their ties to militant groups including ISIS and Al Qaeda.

Jaish al-Islam was set up in Saudi Arabia and Ahrar al-Sham denied sharing Al Qaeda’s ideology and ties to the group, the report said.